Home / 2,125.73-3,188.10-809.21

Finding the Fourth Proportional to 2,125.73, 3,188.10 and 809.21

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Solution

The fourth proportional to 2,125.73, 3,188.10 and 809.21 is: 1,213.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.73 : 3,188.10 = 809.21 : x
  2. Step 2: Convert to fraction form
    2,125.73/3,188.10 = 809.21/x
  3. Step 3: Cross multiply
    2,125.73x = 3,188.10 × 809.21
  4. Step 4: Simplify right side
    2,125.73x = 2,579,842.40
  5. Step 5: Solve for x
    x = 2,579,842.40/2,125.73
  6. Step 6: Final answer
    x = 1,213.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.